\documentclass{article}
\usepackage{CJK}
\usepackage{multirow}
\title{模拟示波器的使用(1031)}

\begin{document}
\begin{CJK}{GBK}{song}

\maketitle

%表一
\begin{tabular}{|c|c|c|c|}
\hline
\multicolumn{4}{|c|}{表一}\\
\hline
 &校准位&中间&逆时针到底\\
\hline
CH1(v)&
\hline
y(格)&
\hline
\multicolum{4}{|c|}{}\\
\hline
CH1(v)&
\hline
y(格)&
\hline
\multicolum{4}{|c|}{}\\
\hline
CH1(v)&
\hline
y(格)&
\hline
\end{tabular}

%表二
\begin{tabular}{|c|c|c|c|}
\hline
f2:两峰间隔数& &\delta y& &V()& &\dalta t(ms)& 
\hline
f2:两峰间隔数& &\delta y& &V()& &\dalta t(ms)&
\hline
\end{tabular}

%表三
\begin{tabular}{|c|c|}
\hline
f_{y}(HZ)&
\hline
f_{y}:f_{x}&
\hline
n_{x}&
\hline
n_{y}&
\hline
\end{tabular}

\end{CJK}{GBK}{song}
\end{document}